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SNMP data source
After the program is started, its configuration is analyzed and the list of active groups is formed. After that, the program is switched into the mode of reading variables from remote devices via the SNMP protocol. The following operations are carried out for every group:
1.If it is time to read variables, the program switches to step 2. Otherwise, the program waits for a time to start a data query;
2.The program receives the value for every variable in the group. If the value is not received, an error message is written to the log file;
3.If "Wait till all items are updated" is enabled the program checks if the values of the variables have changed. If the values of all variables have not changed, the program moves on to step 1. Otherwise, it moves to step 4;
4.Variables are exported depend on the group properties.